Re-2: [meteorite-list] Another LL3 of interest

From: bernd.pauli_at_paulinet.de <bernd.pauli_at_meteoritecentral.com>
Date: Mon Apr 25 16:11:11 2005
Message-ID: <DIIE.0000002B00003772_at_paulinet.de>

> NWA 2769 looks a lot like Krymka, which has been determined
> to also be an LL3.2 by the new Grossman/Brearley methodology.
> Congrats on a beauty.


Hello Michael, David, and List,

Yes, that's a real beauty! My first impression was that it looks
a lot like my two Ragland specimens. My 6.8-gram Krymka slice has
a noticably darker matrix. Anyway, they are all extremely beautiful
and they are all LL3.2 chondrites of sorts !!!

As for Ted Bunch's analysis, the "1-37.2" is the highly variable Fa-range
of the olivines - an indicator that it is a highly "unequilibrated" chondrite,
i.e. of low petrologic grade and thus not very much altered through or affected
by metamorphism.

Even the chromium oxide Cr2O3 (spinel) seems to have a highly variable
chromium content if that reads: Cr2O3 = 0.04 - 0.67 wt% / 0.04 = Cr-poor,
0.67 = Cr-rich.

The average Cr2O3 content usually increases from H to L,
to LL (0.50 - 0.55 - 0.54) but 0.67 is extremely high!


Best wishes and
sincere congrats,

Bernd


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Received on Mon 25 Apr 2005 04:11:09 PM PDT